Light brown umbonate fungi,
Lighter cap margin with darkened center,
Lighter stipe with pruinose apex,
Yellowish gills,
White basal tomentum,
Partial veil on young specimens,
Older specimen cap are hygrophanous,
Growing trailside next to blackberry in sandy soil,
Near sitka spruce/Doug fir/coast redwood/alder,
Bright yellow UV on gills/cap margin/stipe,
No odor,
Red KOH on stipe; more orangey yellow on cap/gills,
Mild bitter taste

Burned Quercus/Pinus dominant woodland (now shrubland post-burn), just west of Knoxville road near Lake Berryessa
Growing in soil and directly off fine roots in a hole leftover from a burned out root system
Brown pileus with a wavy margin. Lamellae white to cream colored, anastomosing, subdistant to distant, broadly attached to subdecurrent. Stipe short, fibrous, off-center
Smell indistinct

Growing from mosses on rocks in live oak and Umbellularia forest in hillside ravine. Pileus dark blue with nearly black scurfy scales. Lamellae light bluish white, sometimes forking, narrowly attached, darkening and becoming covered in pink spores in age, UV+ bright bluish white. Stipe smoothly fibrillose, lacking cottony white base.

Growing from duff and organic matter under Ribes nevadense understory- Calocedrus decurrens, Abies and Alnus rhombifolia nearby
Near East Fork Barton Creek, San Bernardino NF
Subdecurrent gills with pale pink spore print (seen in third photo)
Farinaceous/cucumbery smell
Very bitter/chemically taste
Slightly UV reactive (hard to get photo)

Under leaf and branch litter under Quercus kelloggii, surrounded by Arbutus menziesii, Quercus agrifolia, Q. lobata or a hybrid thereof, and Pinus ponderosa, with an understory that has been badly invaded by Cytisus scoparius following a fire. Pileus dark gray, broadly convex with shallow umbo, with a single small patch of veil tissue stuck to the cap. Lamellae grayish-tan off white, free, very dark for an Amanita. Stipe ornamented with grey chevron patterning, whitish underneath. Volva conspicuously present at base, constricted midway, flaring at the mouth and tapering to a point at the base, very grey especially on the inside. No noticeable scent, UV-, KOH not sampled as only 1 specimen was present.

Found in fog drip saturated Sequoia sempervirens dominant coastal forest with Pseudotsuga menziesii and Notholithocarpus densiflorus understory. MMWD
Fruiting from soil on a moss-covered patched of steep, exposed Earth being held together by Sequoia sempervirens roots
Grey/brown waxy feeling pileus with white, waxy-like broadly attached to subdecurrent lamellae. Fibrous white stipe
Smell and taste indistinct
Blue UV rxn on lamellae
No KOH

“Nivatogastrium” wrightii (?)

Secotioid agaric with shape of squashed baseball. Cap slimy, orange-yellow with fibrillose reddish brown scales. Gills grayish brown, wrinkled, looking like meat. Stipe well-developed but squat; whitish with red-brown scales.

In canyon wall and soil clinging to underside of boulder with roots nearby, presumably belonging to the Quercus chrysolepis uphill. Alder and bay laurel also nearby, alder being downhill near the stream

under a slight shrump in the decomposed grantie like sand was a large fruiting of this mushrooms making a half circle around a Chamise plant. Manzanita was ~5 m away, otherwise it was all chamise. No scent. very viscid cap with a slime veil extending down to the stem, stem had large ridge on it making it slightly flocculus. cap had a grey hue to it in situ, but it may have been due to it being past sundown

UVF 365 nm = dramatic blue

Rodent digs found throughout the area exclusively under chamise. Manzanita also present, and interior live oak within 100 feet, but digs were only under chamise. Digging revealed that the mycelial mat that truffles were found in and smelled the same dissipated with distance from chamise. Melanogaster also mixed in and more abundant. Parts of the mycelial mat smelled like Melanogaster and parts smelled like these -- distinctly of oil paint. Woodrat nest about 8 feet away.

Diminutive solitary fruitbody growing under salvia and chamise; there was an oak on the other side of the trail about 40 feet away, more or less. Video showing the habitat: https://photos.app.goo.gl/bmwpQFsUpivQSTH78